Assighob to shaw kiib compahy



F. D. SHAW.

commuous MLN.

APPLICATON FILED DEC. 39; '1910. Q" ,Pmentemg 15,

M26/@65565, WA4( M W Bil Speciieation et Letters latent.

lPa'tented hug. thi, luth.

Application tiled December it, lull). Serial lilo. 598,053.

To all whom t may conce/rn.-

lBe it knoi n that l, FRANCES D. Shaw, a citizen of the `United States, residing in Chicago, in the county oi Cook and State of illinois, have invented a certain new and useful improvement in Continuous lilns, of which the following is a iull, clear, concise, and exact description, reference beingI had to the accompanying drawings, forming a 'part oi' this speciiication.

My invention relates to continuous kilns, and is particularly concerned With kilns which are adapted to burn brick and various forms ot pottery, such as is disclosed in my copending application, Serial No. 544,183, filed February 16, 1910. Broadly, kilns ot the kind referred to comprise a long tunnel through Which cars loaded 'with the articles to be burned are passed, this tunnel being,V divided into sections, each definite and peculiar section for the purpose of succes sively carrying outfthe various steps of a burning process.l Thus, the first section is constructed particularly todrive the Water from the molded forms which are to be burned; the second section is constructed to subject the articles to a gradually increasing degree of heat; the third section is oon-1 structed to subject the articles to intense heat, while the fourth section is construct ed to allow the articles to gradually cool as they pass therethrough and therefrom.

My present invention is particularly useful in connection with the type of kiln above outlined, but it will appear that it may also be just as Well employed in connection With other forms oi kilns. V

'lhe improvement which l now contem late involvesthe form of the burning chambers which are associated With that section of the kiln in which the articles under treatmentare subjected to the most intense heat, that is, the third section hereinbefore re i'erred to. l propose a special form of chamberA Whereb the burning gases are directed into the hihi chamber in a particu" lar Way so as to secure their even distribution upon the articles which are under treatment. This l secure, as Will be hereinafter pointed out, by providing the Vkiln chamber and thevcombustion chambers with a long'` root', such that the under side thereof willl be even re 7'ular and unbroken so that the v a a.

gasesin their natural course, will be guided moet eilectlvely.

l provide a further improvement in that section of the kiln wherein the articles to be burned are primarily heated. ln this section the articles to be burned are gradually heated so that any moisture retained thereby is driven therefrom and so that they are brought into proper condition to enterthe burninr chamber or burning portion of the kiln, Where they are finally subjecte'd to the most intense influence. ln this primary heating chamber it is necessary and desirable that the drafts be under absolute control since not only is the moisture disposed of in that Way but the primary heating is therebyregulated. Vlhe new -teature which l have proposed in this connection comprises a lurality of side outlets for the chamber as istinguished from a top outlet, the heated air currents, which would tend to rise, thus held or bagged in an eliicient iianner. Each of the outlets which are used to complete the draft system is individually regulated and improved means is provided for control in this respect. Furthermore, as a matter of construction, an improved arrangement of stacks for these outlets is provided.

My invention is embodied in the structure illustrated in 'the accompanying drawings, in Which Figure l is a more or less diagrammatic plan View of the complete kiln of my invention; Fig. 2 is a cross-sectional View taken on the plane of the line 2-2 of Fig. l; Fig. 3 is a partial elevational View of the burning section of the kiln; Fig. 4t a crosssectional View taken on the plane of the line fl-ll of Fig. 3; Fig. 5 is a partial eletill vational View of the primary heating lsection of the kiln; and Fig. 6 is a sectional View taken on the lane oli' the line 6 6 of F ig. 2 and looking 1n the direction indicated by the arrows.

Like reference characters are applied to the same parts throughout the figures.

Referring irst to Fig. 1, thefdrying section of the kiln is shown at ll, the heating section at l2, the burning section at 13, and the cooling section at lll. lt is to be understood that the articles to be burned enter at the drying,l chamber, and, passing through the tunnel-like structure, leave at the coolingJ chamber 14. The specific construction of the drying section of the kiln has nothing to ldo with the present invention and will therefore not be described in detail. Suliice it to say that in my prior application re- 4iter-red to this chamber is described as being provided with a metallic roof upon which the moisture driven 'from the articles to be burned may condense, suitable means being then provided to carry oil the water.

The primary heating chamber 12 is shown in detail in Figs. 2, and G. t will be seen that practically the entire structureis masonry and, in fact, the parts most closely i refractory brick.

concerned with the inside of the kiln are The primary foundation is conveniently a concrete structure 15,

which, inits various forms, extends practically throughout the entire length of the kiln. This concrete structure has a longitudinal trench 16, in which conveying mechanism (not shown), which is provided for the purpose of carrying cars loa-ded' with the larticles to be burned through the kiln,

is disposed. It will be seen that the primary heating chamber has side walls 17, 17, which are of masonry suitably reinforced by longitudinal beams 18, 18. An arch'roof 19 connects these side walls and completes the longitudinalj tunnel through which the cars, abutting end to end, may pass. These cars run upon" rails 20, 20, suitably mounted upon cross bars 21, 21" setin masonry in a finished manner. Theside walls 17 are each provided with a shelf 22, upon which an inverted V rail 23 is disposed, a sand seal 24 being disposed in the resulting trough for a purpose hereinafter pointed out. At the beginning` of'the heating chamber 12 and near the end thereof there is provided a supplementary structure`25 of masonry, which comprises, first, the auxiliary wall 26,which,

together with the main Wall 17, forms the flue 27, these Walls being extended a considerable distance above the roof 19. The two extensions thus provided are connected by beams l28 and tie rods 29 for strengthen-A ing purposes, and are further connected by a cross flue structure 30, the cross Hue 31 itself connecting with the vertical flues 27,

27 ,as best shown in Fig. 2.

enteran alining pocket 37 in the Wall 17..'

This damper is shown in Figs. 2 and 6 and maybe setentirely to close the Hue. As is apparent from Fig. 5, this damper is accessible-from the outside and may be set in any desired position while the kiln is in operation. The air which passes from the hihi chamber through the passagew-.iys 32 and upwardly through the lines 27 and the stack ai is always more or less laden with moisture and as it cools this moisture is condensed on the sides of the stack. The water thus formed may' run down through the stack and the cross iues and may become deposited in the bottom of the lines l27, 27, from which it may be withdrawn in any suitable manner.

Since these drafts are drawn from the sides of the kiln chamber, the tendency for that chamber to retain the heat induced from the burning section is greatly enhanced.

Referring to Figs. 3 and 1, it will be seen that the primary supporting structure of concrete changed in form to accommodate the enlarged refractory walls 25S, 38, which have the externally exposed pockets 39, 30, in which the oil burners 40, 40 are disposed. Each of these oil burners is in the 'form of a reticulated tube eil, which extends downwardly into a pan l2. Fuel is fed to this burner'by means of a short pipe 43, which terminates in a funnel 4l to "short pipes and i6 lead fromi t ined pipes 47 and 48, respectively. Valves 49, 49 are provided for obvious purposes. In the operation of this oil burner the arrangement is first heated to a considerable extent so that the fuel upon reaching it will become volatilized and the combustible mixture will pass upwardly through the passageway 50 into the burning chamber 51. As shown in Fig 4:, such a burning chamber is provided on n n l each side of the mam kiln chamber, and` the arched 'roof 52, somewhat analogous to 'Y the arched roof 19 hereinbefore described,

is so constructed and mounted that it forms a common closing means for the main kiln' chamber and the burning chambers 51, 51. Suitable bracing means for the entire structure is provided inthe way of vertical beams 53, 53 and tie rods 54. As inthe other section of the kiln which has been described, rails 20,20 are provided upon suitable cross bars 21, 21, set in the masonry and the shoulder 22 on each of the sidewalls is continued for continuation of the sand seal 24. As has been hereinbefore stated, the cars :ire placed upon the rails and are arranged to abut each other end to end so that a moving licor is in effect secured. One of the cars is shown at in Fig. 4. Upon eachside v vthe car is provided with a downwardly extending lange 56, Vwhich extends into the sand seal 24;, so that the heat is confined to the chamber above the car. The primary licor of the car is adapted to ,ride under ay shoulder 57 extending inwardly into the kiln chamber from each vof the side walls, this shoulder extending throughout the length of the primary heating section and the burning section of the kiln and throughout the entire length, if desired. Below water trein. dropping upon `burn therein will be gradually directed over toward the main kiln chamber because of the arch-like form ot the roof. Since the under Side or". the roof is en even eontinuous surleee the gases will follow this surface, and Wherefin the center, they meet,

coming Jfrom opposite sides, they will be brought downwardly. This will tend to coax the gases down upon the articles to be burned evenly throughout the area thereof. Because or' the forni of the root und its relation to the mein chamber and the burning chambers, the gases will sweep naturally over toward the center and there will be little tendency for eddy currents :1nd more notion/,et one place than at another. The

resultI is that all the brielr or'other articles The improved eontrol 'ng chamber lwhich has etive in preventing the are evenly burned. ol* the primary nel. been described is elle ie articles to be burned and is also generalgly eieetive in .securing a better brick.

I claim es new and desire to secure by Letters Patent;-

l. In a kiln, the combination of a. burning; section, av pre-heating section, said burning section comprising nl kiln chamber, a eonibueti on .chamber at each side of sind kiln l a chamber, a Conn'non roof for saidliainbers,

and alweer Aadapted to be carried througheeid pre-heating seetion and kiln Chamber in im mediate proximity to said roof.

2. ln e lriln, the combination of e. burning section, a pre-heating Section Said burniiigI section comprising a ylriln chamber, e coinbustion chamber at each Side of seid kiln elmnnber7 e common root for seid chambers, and e moving floor disposed Within seid pre-lieeting section and kiln chamber in iinmediute proximity to Seid roof.

ln a llriln, the combination of e burning'section, aA pre-heating section, said burning section comprising a kiln chamber. a combustion chamber ut eech Side/of said kiln chamber, an arched roof eoifering said sections, :1nd a. car adapted toglie carried through Suid pre-heatingA section and kiln chamber in immediate proximity to seid roof. f' i 1.1;. ln a, kiln.) 'the'eoi'nbinzitiln of e burning section, n preheeting section, Seid burning sect-ion comprising a kiln chamber and u,

.combustion chamber on the 4side of said kiln chamber, en arched-root.' covering said ehem-- lill' bers, and e our adapted to be carried throu 1 k Seid preheating section and kiln ehzunberen immediate proximity to said roof.

5. ln :i kiln, in" conlibinetion, u. primary heating Chamber, a vertical flue on euelside oi? said eliun'ibenn side outlet connecting said chamber with Suid flue, und n well communi-l cating with each of said ues und'tlisposed belowsaid outlet.

ln Witness whereof, 'l hereunto subscribe iny narnethis 12th daylofyDeeember, 1910. A

FRANGll-'S U. SHAW. Witnesses;

JAMES-Eems, Jr. H. D. RosnooM. 

